My cousin made 2 last year.there msde out of plywood in a circular paterern was5x6 with 3side widoows and one widow was a standard gun window.they were very cool looking.some how he cut the top and bottom out of a half moon and framed them in a circular pattern.then lft the widoows about 18 inches wide and 2 ftlong.he said when he got through he had 300 in each pf them. They were very impressive.